13852

12590

كارشناسي ارشد

سيستمهاي قدرت

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

۱۳۹۷

ده، ۸۴ص.:‌ مصور، جدول، نمودار

احمدرضا تابش

احمدرضا زماني

حميدرضا كارشناس، محمدامين لطيفي

1397/06/27

كتابنامه

برق و كامپيوتر

مهندسي برق و كامپيوتر

ID12590

Techno economical Study of Collector Systems for Buoy Wave Energy Harvesters in Persian Gulf Milad Mohammadrezaei m mohammadrezaei@ec iut ac ir August 8 2018 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor s Name Ahmadreza Tabesh a tabesh@cc iut ac irAbstractWave energy is among promising source of renewable energies Compare to wind and solar power waveenergy provides energy with higher power density Despite solar energy wave energy can be harvestedduring all day long So far various techniques are presented for wave energy harvesting a part of thesetechniques use the swing movement of the waves and others use wave turbines to produce energy The waveenergy harvesters are conventionally in the range of several hundred kilowatts and often tens or hundreds ofwave energy harvesters are connected together through a collector system to form a wave power plant Thewave energy harvesters can be interconnected via various collector systems including direct current dc andalternative current ac systems where can be connected in series parallel series parallel and other types ofinterconnection configurations As overhead power lines cannot be used in seas the main advantage of dccollectors over the ac counterpart is the elimination of charging current that is particularly in underwatercables due to its notable capacitive feature However as the captured power from sea waves shouldeventually be injected into an ac power system the use of high power electronic converters is inevitable Theuse of high power converters forces technical and reliability issues In order to select the appropriate collector system considering the charging current limitation in the acsystems and the limitation of use high power converters in dc systems in this thesis dc collector systems arecompared from the point of view of maximum energy delivered to grid and farm costs In order to evaluatethe systems from the point of view of the energy delivered to the grid and the final cost the improvedlevelized cost of energy ILCOE index is introduced for wave power plants and used In order to take intoaccount the not supplied expected energy due to a failure the reliability calculation of the system is performand its impacts on the levelized cost of energy is appropriately modeled Using this idea a method isproposed that can be used to select the suitable collector system configuration for wave power plants Toverify the validity of the proposed method the data of a power plant in California for 3 15 and 29 megawattcapacities are used Then the final cost of wave generated energy for a system with ac collector is calculatedand compared with the existing results The results of the design based on the ILCOE index indicate thatincreasing the inverter capacity to reduce investment costs does not necessarily lead to a reduction in the finalenergy cost Then for the design of the power plant in Iran s coasts data from the Iran Ports Organizationand Subsea Research and Development center at Isfahan University of Technology are used for three ports inIran Anzali Bushehr and Chabahar Using the suggested design methodology shows that Chabahar port isthe most suitable ports in Iran for the implementation of a wave power plants It is also shown that thesuitable collector configuration is a parallel dc system with an inverter power range from 80 up to 150kilowatts KeywordsRenewable energies Wave energy conversion systems Buoy wave energy harvesters Improved Levelized cost of energy Markov model Iran ports Reliability

احمدرضا تابش

احمدرضا زماني

حميدرضا كارشناس، محمدامين لطيفي